It would be great to integrate Searchcord, and have it added to Kagi so can search directly in messages written on Discord.
They currently offer a non-commercial API, but they say they can be contacted for the commercial one.
Link to Searchcord: https://searchcord.io
I currently have a communities lens that searches forums, reddit, etc.
I would integrate Discord as search source for that search; as results tend to not be SEO-optimized and more honest.
